CHARTS
Box and Whisker Plots (or simply boxplots) are very useful plots in descriptive statistics to analyze groups of numerical data through a five-number statistical summary. Box and whisker plots help you to see the variance of data as well as potential unusual data points in a dataset called outliers. The box-plot is especially useful for indicating whether a distribution is skewed and for comparing between two sets of numerical data.
The five statistics summary that a box-whisker plot portray are:
If outliers are present, the whisker on the appropriate side is drawn to 1.5 * IQR rather than the data minimum or the data maximum. This way, outliers are not calculated into the statistics of the dataset and would not be recognized as the minimum/maximum. Small circles or unfilled dots are drawn on the chart to indicate where suspected outliers lie.